Change loglevel option "warn" to "warning".

Author: tomasklingen

typescript/raven-tests.ts

@@ -61,6 +61,7 @@ var err:Error = Raven.lastException();
 Raven.captureMessage('Broken!');
 Raven.captureMessage('Broken!', {tags: { key: "value" }});
 +Raven.captureMessage('Broken!', { stacktrace: true });
+Raven.captureMessage('Warning', { level: 'warning' });
 Raven.captureBreadcrumb({
     message: "This is a breadcrumb message."
 });

typescript/raven.d.ts

@@ -269,4 +269,4 @@ interface AutoBreadcrumbOptions {
     location?: boolean;
 }
 
-type LogLevel = "critical" | "error" | "warn" | "info" | "debug";
+type LogLevel = "critical" | "error" | "warning" | "info" | "debug";